The details in the news article are were incorrect. It says said "the Pokémon Global Link website has reopened, with full access limited to players of Pokémon Black and White", but no one is granted full access yet. The Dream World section is still under maintenance and is expected to launch a week later on Monday 11 October. This is explained in detail on the official site. [link]

Also, I'm not sure whether the Global Link has much to do with the Global Trade Center, apart form connecting people around the world. In-game it seems as though the GTS was reintroduced unchanged, alongside the new GTS Negotiation function which allows you to trade one on one with random people.